patois vs uncool

patois is a noun but uncool is not a noun.

Word	Noun	Adjective	Verb	Adverb
patois	Yes	No	No	No
uncool	No	Yes	No	No

patois (noun)	uncool (noun)
a regional dialect of a language (especially French); usually considered substandard
a characteristic language of a particular group (as among thieves)

patois (adjective)	uncool (adjective)
	(spoken slang) unfashionable and boring